CVE-2026-102995

UNKNOWN 0.0

pypdf: Possible large memory usage for large /ToUnicode streams (Follow-up 2)

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

pypdf is a free and open-source pure-python PDF library. Prior to 6.18.1, a crafted PDF can place unusually large source-code or destination-string tokens in a font /ToUnicode mapping, causing pypdf/_cmap.py parse_bfchar to decode and retain oversized values during operations such as text extraction and consume excessive memory. This is a second follow-up to earlier /ToUnicode resource-consumption fixes and is limited to the remaining token-length path. This issue is fixed in version 6.18.1.

CWE	CWE-400
Vendor	py-pdf
Product	pypdf
Published	Sep 30, 2026

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Affected Versions

py-pdf / pypdf

< 6.18.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/py-pdf/pypdf/security/advisories/GHSA-fp3h-c4fm-7vvf github.com: https://github.com/py-pdf/pypdf/pull/4071 github.com: https://github.com/py-pdf/pypdf/commit/319d0b823ce2c311a2435e9fd93c13994d32bb51 github.com: https://github.com/py-pdf/pypdf/releases/tag/6.18.1